Giovanny Vinícius Araújo de França

Breastfeeding in the 21st century: epidemiology, mechanisms, and lifelong effect

The importance of breastfeeding in low-income and middle-income countries is well recognised, but less consensus exists about its importance in high-income countries. In low-income and middle-income countries, only 37% of children younger than 6 months of age are exclusively breastfed. With few exceptions, breastfeeding duration is shorter in high-income countries than in those that are resource-poor. Our meta-analyses indicate protection against child infections and malocclusion, increases in intelligence, and probable reductions in overweight and diabetes. We did not find associations with allergic disorders such as asthma or with blood pressure or cholesterol, and we noted an increase in tooth decay with longer periods of breastfeeding. For nursing women, breastfeeding gave protection against breast cancer and it improved birth spacing, and it might also protect against ovarian cancer and type 2 diabetes. The scaling up of breastfeeding to a near universal level could prevent 823,000 annual deaths in children younger than 5 years and 20,000 annual deaths from breast cancer. Recent epidemiological and biological findings from during the past decade expand on the known benefits of breastfeeding for women and children, whether they are rich or poor.

Congenital Zika virus syndrome in Brazil: a case series of the first 1501 livebirths with complete investigation

BACKGROUND In November, 2015, an epidemic of microcephaly was reported in Brazil, which was later attributed to congenital Zika virus infection. 7830 suspected cases had been reported to the Brazilian Ministry of Health by June 4, 2016, but little is known about their characteristics. We aimed to describe these newborn babies in terms of clinical findings, anthropometry, and survival. METHODS We reviewed all 1501 liveborn infants for whom investigation by medical teams at State level had been completed as of Feb 27, 2016, and classified suspected cases into five categories based on neuroimaging and laboratory results for Zika virus and other relevant infections. Definite cases had laboratory evidence of Zika virus infection; highly probable cases presented specific neuroimaging findings, and negative laboratory results for other congenital infections; moderately probable cases had specific imaging findings but other infections could not be ruled out; somewhat probable cases had imaging findings, but these were not reported in detail by the local teams; all other newborn babies were classified as discarded cases. Head circumference by gestational age was assessed with InterGrowth standards. First week mortality and history of rash were provided by the State medical teams. FINDINGS Between Nov 19, 2015, and Feb 27, 2015, investigations were completed for 1501 suspected cases reported to the Brazilian Ministry of Health, of whom 899 were discarded. Of the remainder 602 cases, 76 were definite, 54 highly probable, 181 moderately probable, and 291 somewhat probable of congenital Zika virus syndrome. Clinical, anthropometric, and survival differences were small among the four groups. Compared with these four groups, the 899 discarded cases had larger head circumferences (mean Z scores -1·54 vs -3·13, difference 1·58 [95% CI 1·45-1·72]); lower first-week mortality (14 per 1000 vs 51 per 1000; rate ratio 0·28 [95% CI 0·14-0·56]); and were less likely to have a history of rash during pregnancy (20·7% vs 61·4%, ratio 0·34 [95% CI 0·27-0·42]). Rashes in the third trimester of pregnancy were associated with brain abnormalities despite normal sized heads. One in five definite or probable cases presented head circumferences in the normal range (above -2 SD below the median of the InterGrowth standard) and for one third of definite and probable cases there was no history of a rash during pregnancy. The peak of the epidemic occurred in late November, 2015. INTERPRETATION Zika virus congenital syndrome is a new teratogenic disease. Because many definite or probable cases present normal head circumference values and their mothers do not report having a rash, screening criteria must be revised in order to detect all affected newborn babies. FUNDING Brazilian Ministry of Health, Pan American Health Organization, and Wellcome Trust.

How changes in coverage affect equity in maternal and child health interventions in 35 Countdown to 2015 countries: an analysis of national surveys

BACKGROUND Achievement of global health goals will require assessment of progress not only nationally but also for population subgroups. We aimed to assess how the magnitude of socioeconomic inequalities in health changes in relation to different rates of national progress in coverage of interventions for the health of mothers and children. METHODS We assessed coverage in low-income and middle-income countries for which two Demographic Health Surveys or Multiple Indicator Cluster Surveys were available. We calculated changes in overall coverage of skilled birth attendants, measles vaccination, and a composite coverage index, and examined coverage of a newly introduced intervention, use of insecticide-treated bednets by children. We stratified coverage data according to asset-based wealth quintiles, and calculated relative and absolute indices of inequality. We adjusted correlation analyses for time between surveys and baseline coverage levels. FINDINGS We included 35 countries with surveys done an average of 9·1 years apart. Pro-rich inequalities were very prevalent. We noted increased coverage of skilled birth attendants, measles vaccination, and the composite index in most countries from the first to the second survey, while inequalities were reduced. Rapid changes in overall coverage were associated with improved equity. These findings were not due to a capping effect associated with limited scope for improvement in rich households. For use of insecticide-treated bednets, coverage was high for the richest households, but countries making rapid progress did almost as well in reaching the poorest groups. National increases in coverage were primarily driven by how rapidly coverage increased in the poorest quintiles. INTERPRETATION Equity should be accounted for when planning the scaling up of interventions and assessing national progress. FUNDING Bill & Melinda Gates Foundation; World Bank; Governments of Australia, Brazil, Canada, Norway, Sweden, and UK.

Trends in caesarean delivery by country and wealth quintile: cross-sectional surveys in southern Asia and sub-Saharan Africa

OBJECTIVE To examine temporal trends in caesarean delivery rates in southern Asia and sub-Saharan Africa, by country and wealth quintile. METHODS Cross-sectional data were extracted from the results of 80 Demographic and Health Surveys conducted in 26 countries in southern Asia or sub-Saharan Africa. Caesarean delivery rates were evaluated - as percentages of the deliveries that ended in live births - for each wealth quintile in each survey. The annual rates recorded for each country were then compared to see if they had increased over time. FINDINGS Caesarean delivery rates had risen over time in all but 6 study countries but were consistently found to be lower than 5% in 18 of the countries and 10% or less in the other eight countries. Among the poorest 20% of the population, caesarean sections accounted for less than 1% and less than 2% of deliveries in 12 and 21 of the study countries, respectively. In each of 11 countries, the caesarean delivery rate in the poorest 40% of the population remained under 1%. In Chad, Ethiopia, Guinea, Madagascar, Mali, Mozambique, Niger and Nigeria, the rate remained under 1% in the poorest 80%. Compared with the 22 African study countries, the four study countries in southern Asia experienced a much greater rise in their caesarean delivery rates over time. However, the rates recorded among the poorest quintile in each of these countries consistently fell below 2%. CONCLUSION Caesarean delivery rates among large sections of the population in sub-Saharan Africa are very low, probably because of poor access to such surgery.

Prevalência, controle e tratamento da hipertensão arterial sistêmica em Nobres - MT

Metodos: Estudio transversal, de base poblacional, con muestreo aleatorio y con reposicion. El criterio para la clasificacion de la HAS fue la presion arterial (PA) ≥ 140/90 mmHg o el uso actual de antihipertensivos. Se realizaron las entrevistas utilizandose encuestas estandarizadas y comprobadas previamente. Se describieron las variables por promedios ± desviaciones estandar y frecuencias. Se compararon los promedios utilizandose el test t-Student y las asociaciones por medio del test de chi-cuadrado de Pearson, con nivel de significancia del 5%.BACKGROUND Systemic Arterial Hypertension (SAH), considered a public health problem due to its high prevalence and difficult control, is also described as one of the most important risk factors for cardiovascular diseases. OBJECTIVE This study aimed to determine the prevalence of SAH, as well as characteristics related to its control and treatment, among individuals aging between 18 and 90 years from the urban region of Nobres, MT. METHODS Cross-sectional, population-based study, with random sampling and with replacement. For classification of SAH, criteria included blood pressure (BP) > or =140/90 mmHg or current use of antihypertensive drugs. Individuals were interviewed with standardized questionnaires previously tested. Variables were described as means +/- standard deviations and frequencies. Means were compared with the Student s t test and associations were determined with the Pearson chi-square test, with a significance level of 5%. RESULTS SAH has a prevalence of 30.1% in the sample, composed of 1,003 individuals older than 18 years. Among hypertensive individuals (N = 302), 73.5% knew about their condition, 61.9% were under treatment and for 24.2% the BP was under control. A positive association was observed between SAH and age; illiteracy; less than 8 years education; BMI > or = 25 kg/m(2); high and very high waist circumference; waist-hip ratio (WHR) at risk level; sedentariness; and alcoholism. CONCLUSIONS This study showed that SAH represents an important public health problem even in a small district in the interior region of Brazil. Levels of control and treatment of hypertension in the population were higher than those observed in similar studies, but were considered not satisfactory.

Risk factors for early interruption of exclusive breastfeeding and late introduction of complementary foods among infants in midwestern Brazil.

OBJECTIVE To identify factors associated with early interruption (before 4 months) of exclusive breastfeeding and late introduction (after 8 months) of complementary foods. METHODS This is a cross-sectional study, based on a survey conducted on the first day of the National Vaccination Campaign in 2004, in Cuiabá, MT, Brazil. The sample comprised 921 children less than 1 year old, and the adult accompanying each child was interviewed and a semi-structured questionnaire filled out. Probit analysis was employed to assess consumption of liquids and solids, and logistic regression analysis was applied to identify factors associated with early introduction of liquids and with late introduction of solids. RESULTS There was elevated consumption of water and teas, followed by cows milk among those less than 120 days old. Children were more likely to be given liquids on the day of the survey if they had been consuming them on the day they were discharged from the maternity unit. Approximately 60% of the children were being given soup or the family meal by 8 months. CONCLUSIONS Liquids being given on the first day at home was a good predictor that they would be given for the first 4 months, emphasizing the need for intervention during prenatal care and at maternity units to counter the harm caused by this practice. After 8 months, however, it is necessary to emphasize the importance of the child participating in family meals, especially for adult mothers without higher education and primaparous mothers.

Infection-related microcephaly after the 2015 and 2016 Zika virus outbreaks in Brazil: a surveillance-based analysis

BACKGROUND On Nov 11, 2015, the Brazilian Ministry of Health declared a Public Health Emergency of National Concern in response to an increased number of microcephaly cases, possibly related to previous Zika virus outbreaks. We describe the course of the dual epidemics of the Zika virus infection during pregnancy and microcephaly in Brazil up to Nov 12, 2016, the first anniversary of this declaration. METHODS We used secondary data for Zika virus and microcephaly cases obtained through the Brazilian Ministry of Healths surveillance systems from Jan 1, 2015, to Nov 12, 2016. We deemed possible Zika virus infections during pregnancy as all suspected cases of Zika virus disease and all initially suspected, but later discarded, cases of dengue and chikungunya fever. We defined confirmed infection-related microcephaly in liveborn infants as the presence of a head circumference of at least 2 SDs below the mean for their age and sex, accompanied by diagnostic imaging consistent with an infectious cause, or laboratory, clinical, or epidemiological results positive for Zika virus or STORCH (infectious agents known to cause congenital infection, mainly syphilis, toxoplasmosis, cytomegalovirus, and herpes simplex virus). We excluded cases of congenital anomalies or death without microcephaly. We analyse the spatial clustering of these diseases in Brazil to obtain the kernel density estimation. FINDINGS Two distinct waves of possible Zika virus infection extended across all Brazilian regions in 2015 and 2016. 1 673 272 notified cases were reported, of which 41 473 (2·5%) were in pregnant women. During this period, 1950 cases of infection-related microcephaly were confirmed. Most cases (1373 [70·4%]) occurred in the northeast region after the first wave of Zika virus infection, with peak monthly occurrence estimated at 49·9 cases per 10 000 livebirths. After a major, well documented second wave of Zika virus infection in all regions of Brazil from September, 2015, to September, 2016, occurrence of microcephaly was much lower than that following the first wave of Zika virus infection, reaching epidemic levels in all but the south of Brazil, with estimated monthly peaks varying from 3·2 cases to 15 cases per 10 000 livebirths. INTERPRETATION The distribution of infection-related microcephaly after Zika virus outbreaks has varied across time and Brazilian regions. Reasons for these apparent differences remain to be elucidated. FUNDING None.

The phenotypic spectrum of congenital Zika syndrome

In October 2015, Zika virus (ZIKV) outbreak the Brazilian Ministry of Health (MoH). In response, the Brazilian Society of Medical Genetics established a task force (SBGM‐ZETF) to study the phenotype of infants born with microcephaly due to ZIKV congenital infection and delineate the phenotypic spectrum of this newly recognized teratogen. This study was based on the clinical evaluation and neuroimaging of 83 infants born during the period from July, 2015 to March, 2016 and registered by the SBGM‐ZETF. All 83 infants had significant findings on neuroimaging consistent with ZIKV congenital infection and 12 had confirmed ZIKV IgM in CSF. A recognizable phenotype of microcephaly, anomalies of the shape of skull and redundancy of the scalp consistent with the Fetal Brain Disruption Sequence (FBDS) was present in 70% of infants, but was most often subtle. In addition, features consistent with fetal immobility, ranging from dimples (30.1%), distal hand/finger contractures (20.5%), and feet malpositions (15.7%), to generalized arthrogryposis (9.6%), were present in these infants. Some cases had milder microcephaly or even a normal head circumference (HC), and other less distinctive findings. The detailed observation of the dysmorphic and neurologic features in these infants provides insight into the mechanisms and timings of the brain disruption and the sequence of developmental anomalies that may occur after prenatal infection by the ZIKV.

Fatores associados à interrupção precoce do aleitamento materno exclusivo e à introdução tardia da alimentação complementar no centro-oeste brasileiro

OBJECTIVE: To identify factors associated with early interruption (before 4 months) of exclusive breastfeeding and late introduction (after 8 months) of complementary foods. METHODS: This is a cross-sectional study, based on a survey conducted on the first day of the National Vaccination Campaign in 2004, in Cuiaba, MT, Brazil. The sample comprised 921 children less than 1 year old, and the adult accompanying each child was interviewed and a semi-structured questionnaire filled out. Probit analysis was employed to assess consumption of liquids and solids, and logistic regression analysis was applied to identify factors associated with early introduction of liquids and with late introduction of solids. RESULTS: There was elevated consumption of water and teas, followed by cows milk among those less than 120 days old. Children were more likely to be being given liquids on the day of the survey if they had been consuming them on the day they were discharged from the maternity unit. Approximately 60% of the children were being given soup or the family meal by 8 months. CONCLUSIONS: Liquids being given on the first day at home was a good predictor that they would be given for the first 4 months, emphasizing the need for intervention during prenatal care and at maternity units to counter the harm caused by this practice. After 8 months, however, it is necessary to emphasize the importance of the child participating in family meals, especially for adult mothers without higher education and primaparous mothers.

Temporal variation in the prevalence of weight and obesity excess in adults: Brazil, 2006 to 2009

Overweight and obesity are public health issues that affect an important part of the world population. This study aims at describing the trends in overweight and obesity prevalence rates from 2006 to 2009, by means of telephone surveys in 27 Brazilian cities, with a population aged 18 years or older. The body mass index (BMI) was calculated by the reported height and weight; overweight and obesity were considered as BMI >25 kg/m² and >30 kg/m², respectively. Temporal variation in overweight and obesity prevalence is presented for men and women, according to age group, schooling, stable relationship, and skin color. Poisson regression was used for the analysis. Overweight prevalence was 43.0, 42.7, 44.2 and 46.6%,for each year of the period from 2006 to 2009, respectively. For obesity, in the same period, the trend was: 11.4, 12.7, 13.2 and 13.8%. The temporal trend varied in relation to some demographic and socioeconomic variables. The prevalence was higher among women and young adults. The temporal trend was independent of the relationship status of the interviewees, but the prevalence was higher among white women and those with less years of schooling. The results in this study confirmed the urgent need for effective prevention and control measures, as the increasing trend is occurring in a short period of time, especially among youngsters.